CVE-2003-0688: n/a vulnerability

CVE-2003-0688: The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initi...

The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initialize certain data structures, which allows remote attackers to cause a denial of service (process crash) via an invalid DNS response that causes Sendmail to free incorrect data.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 02:05 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2003-0688 is a denial-of-service flaw in Sendmail 8.12.8 and earlier when the enhdnsbl feature is enabled. A malformed DNS response can make the mail process crash. The source bundle does not show data theft, code execution, or confirmed active exploitation. Most likely exposure is legacy mail infrastructure, especially internet-facing MTAs still running Sendmail 8.12.8 or earlier with enhdnsbl enabled. Modern systems or Sendmail deployments without this feature are less likely to be affected. Prioritize if the organization operates legacy Sendmail-based mail relays, especially externally reachable systems. Business impact is service disruption to email, not confirmed data compromise based on the supplied evidence. Mitigation focus: Inventory Sendmail versions on mail relays and legacy Unix systems.; Identify whether enhdnsbl is enabled in Sendmail configuration.; Review relevant vendor advisories for supported update packages..

Prepared: Jun 30, 2026, 09:00 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 3, 2003, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:597CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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